"The wish to hurt others is tied not to autism but to psychopathy, which manifests in a deficiency or absence of empathy and remorse."

"Some autistic people may not recognize why they cause distress; psychopaths don’t care that they cause distress. Autistic people may see the world from a singular, personal perspective; psychopaths are often cunning manipulators who act according to perceived self-interest without regard for the destruction they cause. Psychopathy seems to have coincided with autism in the cases of Mr. Harper-Mercer at Umpqua and Adam Lanza at Newtown, Conn. Psychopathy apparently coincided with depression and grandiosity in the cases of Eric Harris and Dylan Klebold at Columbine and Elliot O. Rodger at Isla Vista, Calif. Psychopathy almost certainly coincided with schizophrenia in the cases of James Holmes in Aurora, Colo., and Jared Loughner in Tucson. You can categorize such people as having a common madness only if your criterion for madness is their behavior itself...."

From a NYT op-ed, "The Myth of the 'Autistic Shooter,'" by Andrew Solomon. Solomon is identified only as "the author, most recently, of 'Far From the Tree,'" so I looked up "Far From the Tree." Subtitled "Parents, Children and the Search for Identity," it's a very long book about the "startling proposition... that being exceptional is at the core of the human condition—that difference is what unites us."